MQTT Jobs

Project Overview This project aims to develop a small WiFi gateway that connects to a Danfoss EKC 202C refrigeration controller via Modbus RTU (RS-485) and provides a local web interface. The system should allow monitoring of key controller values and limited control via a browser. The first version is a local-only solution without cloud connectivity, but the architecture must allow future expansion to cloud services. Hardware Assumptions • ESP32 or similar WiFi-enabled microcontroller • RS485 interface module for Modbus RTU communication • Connection to Danfoss EKC 202C controller (via Modbus adapter) Setup Flow • On first boot the device starts its own WiFi Access Point • User connects via smartphone or laptop • User opens configuration page at • Use...

**Judul Proyek:** Pembuatan Web Dashboard OEE (Data dari Node-RED, MQTT, dan SQLite) **Deskripsi Proyek:** Saya mencari seorang developer untuk membuat **web dashboard industri** yang digunakan untuk memonitor data produksi mesin dan menghitung **OEE (Overall Equipment Effectiveness)**. Data produksi dikumpulkan menggunakan **Node-RED**. Data realtime dikirim melalui **MQTT**, dan data histori disimpan dalam **database SQLite**. Dashboard harus mampu menampilkan **data realtime dan data histori produksi**. Tujuan dari proyek ini adalah membuat **dashboard monitoring produksi yang modern, jelas, dan mudah dibaca**, yang dapat digunakan pada layar komputer atau monitor di area produksi. --- **Sumber Data** Dashboard akan mengambil data dari dua sumber: 1. **MQTT (melalui Node-RED)** ...

I need a full architecture and layout for an advanced, multi-sensor PCB that will regulate heating, cooling and humidity inside a pharmaceutical machine. The board must interface with temperature, humidity and proximity sensors as standard, while leaving room for additional inputs such as light, pressure, water-level and high/low-voltage detectors. All sensing channels have to support automatic failure detection so the system can trigger the right alarm—heater, compressor, open door, over/under temperature, over/under voltage, pressure deviation—without user intervention. On the connectivity side I want both wired and wireless options: LAN, USB, CAN-Bus and RS-485 for plant integration, plus a wireless link for cloud dashboards. A capable processor with dedicated RAM and non-v...

Project Details ₹600.00 – 1,500.00 INR Bidding ends in 6 days, 22 hours Project Scope We would like to proceed with the prototype development of the SoilKare Agricultural Monitoring & Crop Quality Device as described in the engineering specification document we shared earlier. The system includes the following main subsystems: • STM32-based embedded controller • LTE communication module (SIM7600 or equivalent) • Soil monitoring sensors (pH, EC, moisture, temperature) • Water quality sensors (pH, EC/TDS, temperature) • Crop / leaf health sensors (chlorophyll / multispectral sensor) • Agricultural produce quality testing sensors (Brix, nitrate, crop moisture) • External ADC interface (ADS1115 or similar) • RS-485 interface for ind...

Project Scope We would like to proceed with the prototype development of the SoilKare Agricultural Monitoring & Crop Quality Device as described in the engineering specification document we shared earlier. The system includes the following main subsystems: • STM32-based embedded controller • LTE communication module (SIM7600 or equivalent) • Soil monitoring sensors (pH, EC, moisture, temperature) • Water quality sensors (pH, EC/TDS, temperature) • Crop / leaf health sensors (chlorophyll / multispectral sensor) • Agricultural produce quality testing sensors (Brix, nitrate, crop moisture) • External ADC interface (ADS1115 or similar) • RS-485 interface for industrial sensors (Modbus RTU support) • Camera module for pest detection (ima...

I need a seasoned DevOps engineer to stand up and run the entire backend that powers our transport-tracking platform. The system has to ingest GPS data from roughly 300 buses every 10 seconds, which works out to about 2.5 million write events each day, so resilience and low-latency processing are critical. Platform & core stack • Cloud: we’ll build everything on AWS (EC2/ECS/EKS, VPC, IAM, S3, Route 53 ‑ whatever fits best). • Messaging: Redis is my first choice for the real-time pub/sub layer, though I’m open to Kafka if you can justify the trade-offs. • Monitoring: Prometheus for metrics, with dashboards in Grafana; CloudWatch can complement for AWS-native alerts and logs. Key things I expect you to deliver • A fully scripted, infrastructur...

Backend Developer This person builds the core system and integrations. Job Title Backend Developer – Transport System APIs, GPS Integration, Ticketing Platform Job Description Project Overview We are developing a hybrid bus transport management platform that integrates GPS tracking with a custom passenger services system. The system will initially support 250–300 buses and provide real-time telemetry, digital ticketing, and operational monitoring. The architecture combines an existing white-label GPS tracking platform with a custom backend system to support passenger services and transport operations. Responsibilities • Design and develop backend APIs • Integrate white-label GPS tracking system • Implement real-time bus location ingestion • Develop dig...

I have an ESP32 dev board on my bench and need it turned into a compact sensor hub. The entire focus is sensor integration—specifically motion & proximity plus light & sound. Some of the devices will be hard-wired to GPIO pins while others should connect wirelessly, so the firmware must handle both connection paths seamlessly. Here’s exactly what I need delivered: • Well-commented source code (Arduino-ESP32 or ESP-IDF) that polls each sensor, filters noise, and publishes readings over Serial and MQTT. • A clear wiring / pin-out diagram for the hard-wired sensors. • Configuration notes that let me pair or re-pair any wireless sensor modules. • A short README covering library installs, flash commands, and expected output. Acceptance criteri...